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How to share an external USB hard drive from Ubuntu to a Windows network - The Travelin' Librarian
Update 25 July 2015: I’ve just had to replace my media server and re-perform these instructions. Somewhat surprisingly they hold up under my current Ubuntu 14.02 LTS/Windows 8.1 setup. I’ve also made small changes to the text which now has you launching the Samba Configuration GUI from the command line instead of from the Gnome …